First approximation of CCNx protocol stack

diff --git a/model/ccnx-l4-protocol.cc b/model/ccnx-l4-protocol.cc
new file mode 100644
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+++ b/model/ccnx-l4-protocol.cc
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+// -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*-
+//
+// Copyright (c) 2006 Georgia Tech Research Corporation
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// Author:
+//
+
+
+#include "ccnx-l4-protocol.h"
+
+#include "ns3/uinteger.h"
+
+namespace ns3 {
+
+NS_OBJECT_ENSURE_REGISTERED (CcnxL4Protocol);
+
+TypeId 
+CcnxL4Protocol::GetTypeId (void)
+{
+  static TypeId tid = TypeId ("ns3::CcnxL4Protocol")
+    .SetParent<Object> ()
+  ;
+  return tid;
+}
+
+CcnxL4Protocol::~CcnxL4Protocol ()
+{
+}
+
+} //namespace ns3